chore(ci): remove duplication from fabfile for AGW integration tests

[Neudrino]

Summary

• Unbelievable that the same method was implemented twice. And yes, the deleted lines are in the other workflow as well. They might be one level higher or lower though.

Test Plan

• CI

[github-actions]

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[github-actions]

feg-workflow

    2 files  203 suites   40s ⏱️
374 tests 374 ✔️ 0 💤 0 ❌
388 runs  388 ✔️ 0 💤 0 ❌

Results for commit 7879869.

♻️ This comment has been updated with latest results.

[github-actions]

dp-workflow

14 tests   14 ✔️  3m 6s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit 7879869.

♻️ This comment has been updated with latest results.

[github-actions]

agw-workflow

615 tests   611 ✔️  3m 48s ⏱️
    2 suites      4 💤
    2 files        0 ❌

Results for commit 7879869.

♻️ This comment has been updated with latest results.